CVE-2020-22552

The Snap7 server component in version 1.4.1, when an attacker sends a crafted packet with COTP protocol the last-data-unit flag set to No and S7 writes a var function, the Snap7 server will be crashed...

Code injection

The Snap7 server component in version 1.4.1, when an attacker sends a crafted packet with COTP protocol the last-data-unit flag set to No and S7 writes a var function, the Snap7 server will be crashed...

PT-2020-15480 · Snap7 · Snap7

Name of the Vulnerable Software and Affected Versions: Snap7 version 1.4.1 Description: The issue occurs when an attacker sends a crafted packet using the COTP protocol with the last-data-unit flag set to No, and the S7 function writes a variable. This results in the Snap7 server crashing...